Does a transition period need to be in writing?

Plenty of sellers and buyers shake hands on "I’ll be around to help for a while" and never write down what that actually means. It usually works out fine until it does not, and when it does not, the absence of anything written is exactly the problem.

The three places transition terms usually live

• A standalone consulting agreement, used when the seller provides advisory support without becoming an employee
• An employment agreement, used when the seller stays on payroll for a defined period after closing
• A schedule or exhibit attached directly to the purchase agreement, setting the transition terms out alongside the rest of the deal

What the document actually needs to say

A workable transition document states the specific tasks or areas of support expected, the time commitment in terms a court could measure, whether the seller is paid and how, and what happens if either party wants to end the arrangement before the agreed period is up. Vague language like "reasonable assistance" invites exactly the disagreement it was meant to prevent, because reasonable means something different to each side once a dispute actually starts.

Why an unwritten promise causes disputes

An unwritten promise fails in a predictable way: the seller’s idea of "helping out" shrinks once they are paid and no longer feel invested, the buyer’s idea of what was promised tends to expand the moment something goes wrong, and neither side has anything concrete to point to when they disagree. Nobody can enforce an understanding that was never written down, which leaves the buyer with little beyond the general representations already in the purchase agreement.

Put it in the deal, not in a side conversation

The negotiation before closing is the point where a buyer has real leverage to insist on documented transition terms — after the funds move, that leverage is largely gone. Raising it early, as part of the offer or the purchase agreement drafting process, is far more effective than trying to formalize an arrangement after a seller has already started drifting away from it.